Hm. Perhaps there's meant to be a point on the lever that engages that second ratchet, but it's worn away a bit?
It looks like the sort of thing that's meant to let one ratchet go, catching it on the other, allowing it to move one position when the lever's actuated. But that's evidently not happening...
Seems like this is wrong:
Originally Posted by
Kimmo
The flipper and mouse ear each pivot so as to engage a ratchet when pressed; you can pretty much disregard each end of the mechanism as it's simply about actuation. The action is all in that little bit in the centre
The mouse ear's actuation has become part of the guts, by the look. Simpler parts, slightly more complex principle.